Collapsible pistol tube

ABSTRACT

A firearm comprised of an upper receiver defining a bolt passage and a lower receiver configured to connect to the upper receiver and having a mount registered with the bolt passage. A buffer tube connects to the mount in registration with the bolt passage. The buffer tube includes a forward portion connected to the mount and a rear portion telescopically connected to the forward portion and operable to move in a range of positions with respect to the upper receiver and a lock mechanism operable to secure the rear portion in a selected position.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Patent Application No. 62/936,754, filed on Nov. 19, 2019, entitled “Collapsible Pistol Tube”, which is hereby incorporated by reference in its entirety for all that is taught and disclosed therein.

FIELD OF THE INVENTION

The present invention relates to firearms classified as pistols and configured to receive wrist-stabilizing braces.

BACKGROUND AND SUMMARY

Pistol braces are employed for assisting the aiming of pistols including the AR-15 format with a protruding buffer tube. These help to stabilize the pistol on the user's wrist or forearm. However, because such pistols have tubes of limited length, this limits the choices for the relative position of the brace depending on the user's arm length and preferred support geometry.

The preferred embodiment addresses these concerns by providing a firearm with an upper receiver defining a bolt passage. A lower receiver is configured to connect to the upper receiver and has a mount registered with the bolt passage. A buffer tube is connected to the mount in registration with the bolt passage, and includes a forward portion connected to the mount and a rear portion telescopically connected to the forward portion, and is operable to move in a range of positions with respect to the upper receiver. A lock mechanism operates to secure the rear portion in a selected position.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 top shows the brace extended and attached to a pistol lower receiver.

FIG. 1 bottom shows the brace collapsed and attached to a pistol lower receiver.

FIG. 2 is a comprehensive exploded view showing all components oriented in a disassembled state. It details the bottom side of the outer and inner tube showing the incremented slots for locking the tubes at varied positions.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

The collapsible pistol tube is a device that, once installed on an AR15 pistol lower receiver (8) or properly designed adapter, allows the user to adjust the buffer tube length for more comfortable and accurate shooting.

The collapsible pistol tube's major components (FIG. 2) are an inner tube (1), and outer tube (2), A reduced diameter recoil spring (3) and a locking lever (7). It is adjustable with 3 inches of travel (FIG. 1). Aside from a two piece design, it further differs from a standard fixed pistol tube in that the recoil spring (3) is of a reduced diameter to accommodate the reduced diameter of the inner tube (1).

The locking lever (7) releases and locks the outer tube (2) into position by means of a spring pressure and detent slots (6). The user can depress the locking lever against the spring to release the mechanism. Once the outer tube (2) has been optimally positioned, the locking lever (7) is released and locks into a corresponding detent slot (6) machined into the inner tube (1). 

I claim:
 1. A firearm comprising: an upper receiver defining a bolt passage; a lower receiver configured to connect to the upper receiver and having a mount registered with the bolt passage; a buffer tube connected to the mount in registration with the bolt passage; the buffer tube including a forward portion connected to the mount and a rear portion telescopically connected to the forward portion and operable to move in a range of positions with respect to the upper receiver; and a lock mechanism operable to secure the rear portion in a selected position. 